# Rectangle calculation

Description for the calculation of rectangles

## Rectangle Calculation

A rectangle is a simple geometric shape and has the following characteristics

• It has four sides and four corners

• All corners are rectangular

• The opposite sides are parallel and have the same length

• Both diagonals are the same length

## Formulas for rectangle calculation

#### Calulate Length $$a$$ of a rectangle

$$a = A / b$$

#### Calulate Width $$b$$ of a rectangle

$$b = A / a$$

#### Calulate Area $$A$$ of a rectangle

$$A = a ·b$$

#### Calulate Perimeter $$P$$ of a rectangle

$$P = (2 · a) + (2 · b)$$

#### Calulate Diagonal $$d$$ of a rectangle

$$d = \sqrt{a^2 + b^2}$$